Logicboard not sucking power
Hi Guys, I have replaced an iPhone 7 Plus Screen, All went good, But then, The iPhone won't turn on without being plugged in, I have :
Tried to reset with screen on - Error 4103
Tried to reset with screen off - Error 4103
Battery Unplugged - Error 4103
New Battery - Error 4103
(iTunes Error)
Prior to screen replaced, the battery worked fine
I'm at a total loss, The iPhone won't turn on with a battery plugged in no matter what
Any recommendations?
Thanks
Update (07/21/2018)
Just to add, When connected to mains, iPhone turns on, then keeps rebooting itself, unless forced into iTunes Recovery, but then Error 4103 on reset - I'm assuming it's because it can't hold any power - iPhone dies completely without cable plugged in
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